Spicy Citrus Glazed Pork

This is something I "accidentally" made up a couple of years ago that we both really like.

1.5 lbs pork "sirloin" or shoulder, cut into 1" cubes.
4 cloves garlic, chopped
1/2 onion, medium dice
2 Tbs cumin seeds
1 Tbs coriander seeds
1/4 cup cider vinegar
1 cup OJ
1/4 cup ketchup
4-6 chipotles, finely chopped + some of the adobo
chicken stock as required
juice of two limes
canola oil
salt and pepper to taste

Get a couple Tbs of canola oil really hot in a sautee pan and brown the pork (with liberal salt and pepper) well. Work in batches to avoid crowding the pan.
Remove the pork from the pan as well as some of the oil (if it seems like there's a lot left).
Add the cumin and coriander seeds and toast for a minute or so.
Add the garlic and onion and sautee a few minutes until the onion starts to go translucent.
Deglaze with the cider vinegar.
Add the OJ, ketchup, peppers, and adobo and bring to a boil. Add back the pork as well as whatever liquid collected around it. Simmer, uncovered, until the pork is tender (~30 minutes). If the liquid gets too low, add chicken stock.
Raise the heat and boil, stirring frequently, until the liquid is just a glaze. Add the lime juice and reduce back to a glaze state.
Adjust seasonings.